If you want you can take a 7.4V lipo and a DC DC step up module to work everywhere you want without the need of a Computer or power supply. Run the first sketch (onoff.ino) to turn the laser on and off every second. Using a single photodiode we just get one signal. Did you make this project? Luckily I found a piece of a waver with very tiny structures. I use a cd-rom-drive instead of a DVD- or bluray-drive, because in the early days of this technology the pins have been larger and more separated than in modern drives... You'll have to find out the two Pins for the vertical coil and the laserdiode. If no object is on the moving-table, I get voltages in the range of 0.2V. 3 years ago. Can you say something about using red laser not for DVD's but CD's (which are tuned to infrared-laser) or blue laser not for bluray-disc's but CD's? Therefore we first have to eliminate the Offset (0.2V) and second we have to amplify the signal up to 100 times. Focusing right is a difficult work because we are speaking about µm. What I really want to know is: how long take an image with your LSM to complete? It's in the focus, when the Signal (B + C) - (A + D) gets zero. I have not studied them in enough detail to know if they have the needed resolution. Hello, im pretty new to arduino and would like to build a laser microphone. You'll have to look for suitable speakers with little movement. 3,8 sur 5 étoiles 17. Question Maybe you'd like to take a look at my YouTube-channel (https://www.youtube.com/user/stopperl16/videos). 240 steps * 17). In my opinion only the (re)writable ones are doped with a corresponding colour: bluish for DVD, reddish for blu-ray. Afzal Rehmani 1,718 views 4 months ago. (LDR With a pinhole): 3,6 V in focus and 0,3 V with nothing in the light path. For this purpose I use a LM358. I used the SPI to send values between 0 and 5V to the outputs of the MCP4922, but I don't know how the loop need to be for a good control. The speaker-membrane is moving and therefore the object-table, which is connected with the membrane is moving too. Electronics tech of 45yrs. Bstanko6 Guest; DIY laser microphone. $4.50. Livraison à 0,01€ seulement pour votre première commande expédiée par Amazon. With some resistors and a Transistor I'm able to vary the current through the Speakers up to 250mA. 6,99 € 6,99 € Recevez-le demain le 21 novembre. If you prefer processing you'll have to send the data in the following way: Using the TFT-Display you'll need the UTFT-library. Because of the current through the Speaker, the Membrane is moving outwards (or inwards if the current direction is turned around)... Well done. To make this easier, you should use a 10-turn-potentiometer (in my case a 100Ohm-type parallel to a fixed 100Ohm-resistor to get 0-50 Ohm). 650nm 6mm 5V 5mW Laser Dot Diode Module Head Red (Sliver) 650nm 6mm 5V 5mW Laser Dot Diode Module Head Red. Add to Cart. Horloge sous Arduino avec des Leds Strip Dans ce tutoriel, je vous montre comment réaliser une grande horloge numérique pilo Today in this tutorial we are going to make another simple & cool DIY Electonic Project “Music Reactive LED using Arduino“. Joystick and 4 keys Keypad module and Shield for Arduino Joystick and 4 keys Keypad module and Shield for Arduino. WayinTop 10pcs 5V 650nm Rouge Diode Laser Tête Laser Dot Diode Modul + 20pcs Photorésistance LDR Résistance Dépendant de la Lumière 5 mm GL5539 5539 pour Arduino . $11.50. KY-008 650nm Laser 5mW Laser Transmitter 6mm 5V 5mW Laser transmitter. You also managed to nail it! I'm looking for a little help on where to start this project. Arduino Forum > Using Arduino > Project Guidance > DIY laser microphone; Print. Did you variate the value, sent to the DAC, between 0 and 4095 and made the outputs oscilate between 0 and 5V in a loop, or did you use other logic? So look at my results and judge for yourself if it is worth to try, if it's not to much of an effort, to put in a DVD pick-up instead of a CD pick-up! In my case I've changed the build in photo Diode with a lot of Pins against a single BPW34 with just two Output-Pins. Concerning the laser-colour (the lower the wavelength the sharper) I have my doubts, because when I'd use f.e. Go Down. Trying to remember programming C from 25yrs ago. 4,3 sur 5 étoiles 46. Finally everything is mounted on a wooden plate and all the outputs and potentiometers are mounted too. There you download the UTFT-library for arduino. Some words concerning the principle: The pinciple is quite simple. I think also that the optical quality of my red laser's collimating lens isn't really good (what partially should explain the difference in image quality). After a left-to-right scanline, increase y position and move too far left for the x=0 position. If you lay a few readymade different types with the label side down on a table its hard to tell wich is wich, they are all silvery. $3.30. http://www.rinkydinkelectronics.com/library.php, https://www.youtube.com/user/stopperl16/videos. CD samples: Both a cd, 1st with uv, 2nd with red. Feb 10, 2014, 02:27 pm. 1 year ago. 2: Circuit diagram for interfacing laser LED module with Arduino. Waveshare Laser Receiver Module Laser Sensor Module Transmitter Module for AVR PIC. … This can be easily realized with a LM317 and some resistors. Just a thought, I think you can get sharper images if you should use a DVD pick-up (red laser), or better, a blu ray pick-up (uv laser) instead of a cd pick-up( ir laser). I'd go with a photodiode rather than an LDR (I think a solar cell's response is more like a photodiode). Thanks, Reply Maybe it´s too late to get an answer, but I will try: I am trying to reproduce the xy movements with the speakers and i was thinking in how did you program the Arduino to control them? But don't worry, there's another way to find the right Position of the coil. To drive the Speakers I use a MCP4922-DAC. Older cd-drives are suitable for the laser microscope because they aren't so miniaturized like modern drives. Hi, congratilations for the project! ), so I'm gonna take a closer look at your photodiode solution as that is maybe a better way to detect the reflected light! Most internet sites say I need a laser and a receiver. 11,99 € 11,99 € Recevez-le vendredi 27 novembre. For this purpose I … The MCP4922 gets a digital value from 0 to nearly 4096 (f.e. It combines everything we need, a laser-Diode, a lens with variable Focus and a photodiode. Firstly, use the laser on and off the LDR to see if it actually senses the laser. You'll have two ways of visualization, with the Software processing or with a TFT-display. Thank's for your kind words. Voila', there are the 0's and 1's. I don't eliminate any offset. But the main Goal of my Project was to visualize the pit-structure of a compact disc. Well done! With the 10 kOhm potentiometer at the base influences the magnification. Therefore we first have to eliminate the Offset (0.2V) and second we have to amplify the signal up to 100 times. "The problem is in the code you didn't post.". Hi. With this slide put on the moving-table you can easily find out the magnification. Where mine ( "https://www.instructables.com/id/Laser-Scanning-Mic... for the interested!) Next, connect pin A0 (ADC channel 0) of Arduino to pin 2 of the laser module. … To focus right the current through the focusing coil is varied. The arduino is able to read voltages between 0 and 5V. $19.50. The larger the value of the potentiometer, the higher the magnification. 2 Micro 130 DC Motor 3.3v for Arduino Arduino DC Motor. $17.50. In a laser pick-up however it must be excellent. These differences in sharpness can you see in my results were images are taken with red, green and uv lasers. That photocell is then connected to a recording device. Daumen hoch für den Contest :). Connect pins 7 and Gnd of Arduino to pins 1 and 3 of KY-008 module, respectively. The higher the resistance of the potentiometer, the lower the current through the base and the collector of the transistor and the lower the movements of the speaker --> higher magnification.